An examination of the effects of argument mapping on ... · to ‘glue’ the structure of the...
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EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
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Dwyer, C., Hogan, M. J., & Stewart, I. (2013). ‘An examination of the effects of
argument mapping on students’ memory and comprehension performance’. Thinking
Skills & Creativity, 8, 11-24.
Abstract
Argument mapping (AM) is a method of visually diagramming arguments to allow for easy
comprehension of core statements and relations. A series of three experiments compared argument map
reading and construction with hierarchical outlining, text summarisation, and text reading as learning
methods by examining subsequent memory and comprehension performance. Effects of study
environment, argument size, learning strategy (active and passive) and recall interval (immediate and
delayed) were also examined. Results revealed that argument map reading and construction
significantly increased subsequent immediate recall for arguments in both passive and active learning
settings. These findings indicate that AM is a useful learning and teaching methodology, particularly in
comparison with standard text-based learning. Results are discussed in light of research and theory on
learning and memory.
Keywords: argument mapping, cognitive load, immediate recall, delayed recall, comprehension
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1.0 Introduction
As much of the knowledge to be acquired by students in school and university requires
reading academic textbooks, an important goal for teachers is to aid students in their acquisition of
textbook knowledge. However, for long pieces of text, learning can be difficult because the creation of
an integrated representation in long-term memory is constrained by ongoing storage limitations in
working memory (Cowan, 2000; Miller, 1956). Some researchers have suggested that because it is too
memory intensive to remember everything from a passage of text, a macrostructure, or the ‘gist’ of the
text, is stored in long-term memory, and this represents the summary information a reader considers
important (Kintsch & van Dijk, 1978). Hence, it is this macrostructure, and not the original text that the
reader remembers when later asked to recall the text (Kintsch & van Dijk, 1978). The problem with this
learning strategy is that although the formulation of a macrostructure presumably facilitates recall of
information, it is likely that information is not encoded at a very deep level of specificity; in other
words, the detail of propositions and of relations between propositions will probably not be
remembered.
Various organizational strategies have been devised to enhance long-term retention of
information, including, for example, summarisation (Kintsch & van Dijk, 1978), hierarchical
summarisation (Taylor, 1982) and graphic organisation (Robinson & Kiewra, 1995). Research suggests
that when to-be-remembered information is presented in a well-organized manner, the level of free
recall is better than when it is presented in a random order (Bower et al., 1969; Myers, 1974). Also,
readers who are sensitive to text structure recall more information than readers who are not (Meyer,
Brandt & Bluth, 1980).
Hierarchical summarisation is an explicit, active organisational strategy. It involves extracting
and summarising the key themes and sub-themes in a text. Taylor (1982) found that the use of
hierarchical summarisation (more commonly known as outlining), increased recall of text in students
who were trained in the use of the technique. A similar study by Berkowitz (1986) provides a rare
example of how organizational strategies can be used to facilitate learning of prose arguments.
Berkowitz taught students to construct maps of prose passages. Using this mapping strategy, the main
ideas from the passages were summarised in separate boxes and supporting claims were listed as bullet
points beneath each of the main ideas. The boxes were organized in a radial structure (i.e. around a
central claim). Berkowitz found that for students who used this technique overall recall of passages was
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significantly improved relative to students who used traditional study techniques (i.e. question-
answering and re-reading procedures).
Although Berkowitz described her maps as a graphic representation of the superordinate and
some of the more important subordinate ideas in a passage, organized in a manner similar to the way
the author organized them in the original selection, the propositional content of the radial maps did not
represent fully planned arguments. Also, although Berkowitz attempted to construct maps that
corresponded to the way the author organized ideas in the original selection, the radial structures in no
way reflected the structure of the argument (see Twardy, 2004 for a discussion of the text to argument
map translation process). Therefore, a critical question is whether or not the reading and construction of
more explicit, complete, logical, hierarchically structured maps that faithfully represent the structure of
an argument can be used as part of a package of classroom learning activities to facilitate students’
assimilation of and memory for arguments. One such organisational strategy developed quite recently
and that shows particular promise in this regard is argument mapping (e.g. van Gelder, 2000; 2007).
Argument mapping (AM) is a method of visually diagramming arguments in an organised
hierarchy, in order to simplify the reading of an argument structure and allow for easy assimilation of
core propositions and relations. The AM uses a ‘box-and-arrow’ design in which boxes represent
propositions within an argument while arrows make the inferential relationships between these
propositions explicit (see Figure 1 for an example). Boxes are colour-coded to indicate the nature of
propositions (e.g. reasons, objections, rebuttals), and arrows are labelled so as to specify the nature of
the relationship between the propositions (e.g. but, because or however). The use of coloured boxes,
arrows connecting boxes, and semantic cues describing relations between propositions are all designed
to ‘glue’ the structure of the argument together and allow the reader to analyse and evaluate a line of
reasoning with ease. This system of representation may therefore help to reduce the burden associated
with analysing and evaluating text-based argument structures and facilitate subsequent memory and
comprehension.
More specifically, when it comes to analysing arguments, the problem with traditional text-
based learning is that it does not allow one to readily connect statements that support and dispute
specific reasons. The learner must engage in a cognitively demanding process of linking propositions
that are located in different paragraphs, on different pages, and so on. When reading a text-based
argument, the reader must mentally construct the argument, thus switching attention away from the
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information presented in the text. In a series of seminal studies, Pollock, Chandler & Sweller (2002)
found that learning is impeded when instructional materials require a high degree of attention
switching, for example, between text and figures. They concluded, more generally, that encoding
environments that increase the cognitive load placed on the reader tend not only to slow the learning
process, but also reduce overall levels of learning.
The provision of a visual representation of an argument structure may reduce the cognitive
load associated with conjointly reading and mentally representing the structure of an argument (Dwyer,
Hogan & Stewart, 2010; van Gelder, 2000; 2003). First, AMs utilise Gestalt grouping principles; and
research suggests that when to-be-remembered items are organised according to Gestalt principles,
such as proximity and similarity, they are better recalled (Woodman, Vecera, & Luck, 2003; Jiang,
Olson & Chun, 2000). For example, AMs place related propositions close to one another, thus
complying with the Gestalt grouping principle of proximity. Furthermore, AM uses a consistent colour
scheme to highlight reasons, objections, and rebuttals in an argument structure, thus complying with
the Gestalt grouping principle of similarity.
Second, unlike standard text, AMs represent arguments through dual modalities (i.e. both
verbal and visual-spatial forms of representation), thus facilitating both the latent information
processing capacity of individual learners and better recall beyond that of encoding information
associated with either verbal or visual-spatial aspects alone (Mayer, 1997; Paivio, 1986; 1971). Dual-
coding theory and research (Paivio, 1971; 1986), Mayer’s (1997) conceptualisation and empirical
analysis of multimedia learning, and Sweller and colleagues’ research on cognitive load (Sweller,
2010), suggests that learning can be enhanced and cognitive load decreased by the presentation of
information in a visual-verbal dual-modality format (e.g. diagram and text), provided that both visual
and verbal forms of representation are adequately integrated (i.e. to avoid attention-switching
demands). Given that AMs support dual-coding of information in working memory via integration of
text into a diagrammatic representation, cognitive resources previously devoted to translating prose-
based arguments into a coherent, organised and integrated representation are ‘freed up’ and can be used
to facilitate deeper encoding of arguments in AMs, which in turn facilitates successful retrieval
(Dwyer, Hogan & Stewart, 2010). Thus, it may be that AM can provide a system of argument
representation that may help readers to better encode, assimilate and recall arguments.
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Third, AM presents information in a hierarchical manner. When arguing from a central claim,
one may present any number of argument levels which need to be adequately represented for the
argument to be properly conveyed. For example, an argument that provides a (1) support for a (2)
support for a (3) support for a (4) claim has four levels in its hierarchical structure. More complex or
‘deeper’ arguments (e.g. with three or more argument levels beneath a central claim) are difficult to
represent in text due to its linear nature; and yet it is essential that these complex argument structures
are understood by a student if their goal is to remember the argument (Pollock, Chandler & Sweller,
2002). However, AMs make explicit the hierarchical structure of the argument, thus alleviating
working memory of cognitive load associated with assimilating the structure of the argument, as would
be the case in studying traditional text.
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Although argument maps have been in existence for almost 200 years (Buckingham-Shum,
2003; Reed, Walton & Macagno, 2007; van Gelder, 2007), it is only with the advent of various
argument mapping software programmes, such as Rationale™ (van Gelder, 2007), that the time
required to construct an argument map has been substantially reduced, as the construction of an
argument using this software needs only the choice of an appropriate box and associated relational cue,
the typing of text into the box, and the selection of an appropriate location for the box in the argument
structure (i.e. in relation to other propositions).
Though other forms of argument diagramming exist, such as concept mapping and mind-
mapping (Buzan & Buzan, 1997), they differ from argument mapping based on the manner in which
they are organised and the way in which each ‘proposition’ is presented. For example, the problem with
many concept mapping techniques is that they do not present an argument per se. Instead, they present
a graphical structure that acts as a representation of a separate text, which might be used to diagram:
the links among concepts, decision-making schemes, a set of plans or instructions, or at best, act as an
argument overview – which does not represent the argument in full. Thus, because the text of the
argument and the diagram may often be separate entities, concept mapping may become more
cognitively demanding by adding the necessity of switching attention from text to diagram and vice
versa (e.g. Chandler & Sweller, 1991; Pollock, Chandler & Sweller, 2002; Tindall-Ford, Chandler &
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Sweller, 1997). In addition, if the reader of a concept map is not familiar with the information from
which the map is derived, then the map itself becomes meaningless. Thus in this context, concept
mapping strategies may not necessarily be useful pedagogical aids that are open to analysis by
everyone.
A small number of studies suggest that AM may help to improve overall critical thinking after
extended deliberate practice (Butchart et al., 2009; van Gelder & Rizzo, 2001; van Gelder, Bissett &
Cumming, 2004) and memory ability after minimal exposure to argument maps (Dwyer, Hogan &
Stewart, 2010). For example, a recent study conducted by Dwyer, Hogan and Stewart (2010) suggests
that the reading of AMs results in better memory performance than the reading of text. Six groups of
students were given 10 minutes to study the argument ‘Computers can think’ (adapted from Horn,
1999) and were subsequently tested for both memory and comprehension. Arguments were presented
to groups in six different conditions: (1) a 30–proposition (small) text, (2) a 50-proposition (large) text,
(3) a 30-proposition monochrome argument map, (4) a 50-proposition monochrome argument map, (5)
a 30-proposition colour argument map, or (6) a 50-proposition colour argument map. Results revealed
that those who studied from AMs (regardless of colour or size manipulation) scored significantly
higher on the memory test than those who studied from text.
The current set of three experiments sought to extend previous research by examining whether
the apparently beneficial effects of AM are transferable across (1) different study and testing
environments, (2) time (i.e. from immediate memory to delayed memory testing), (3) different study
strategies (i.e. passive and active learning) and (4) different topics studied, that is, in comparison with
text reading, text summarisation and hierarchical outlining. The core manipulations and hypotheses
associated with each experiment are summarized in Table 1.
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Insert Table 1 around here
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2.0 Method
2.1 Overall Procedure
Three experiments employing first year undergraduate Arts students as participants were
conducted over a two year period. In each experiment, an argument was presented to students for
purposes of study and afterward a cued recall test was administered. The latter consisted of a set of
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statements from the original study materials. Underneath each statement was either ‘Because’, or ‘But’,
followed by a set of blank lines. Participants were asked to fill in the correct reason or objection to each
statement based on the argument previously studied. Memory tests were scored by two independent
raters who used a standardized scoring manual to code responses. Experiment 1 (but not Experiments 2
or 3) also included a comprehension test, which consisted of a set of 12 of the propositions from the
original study material. Each question asked whether the statement was either a reason or an objection
to the central claim: Computers can think.
In all three experiments, all participants were first introduced to concepts of thinking skills,
critical thinking and AM in a lecture delivered in the two weeks prior to commencement of the
experimental work. In addition, the verbal and spatial sub-scales of the Differential Aptitude Test
(Bennett, Seashore & Wesman, 1986) were administered. The verbal reasoning sub-test of the DAT
tests analogical reasoning by providing sentences with missing words (e.g. “___ is to night as breakfast
is to ___” ) and five word-pairs to choose from that complete the sentence correctly (e.g. supper —
corner; supper — morning; corner — morning; etc.). The spatial reasoning sub-test asks participants to
mentally fold cut-outs to produce an object, the correct one being embedded in an array of four choices.
Previous research on the DAT revealed that internal consistency reliability coefficients for verbal
reasoning are consistently in the .90s, while those for spatial reasoning are consistently in the .80s
(Anastasi, 1988; Wang, 1993). Students were provided with 20 minutes to complete both reasoning
tests, each of which consisted of 20 items.
Given that the reading and construction of AMs requires the ability to reason both verbally
and spatially, both verbal and spatial reasoning ability were assessed as baseline measures and included
as covariates in the analysis of group differences, in order to control for any pre-existing differences in
ability among groups assigned to different experimental conditions. In addition, as described in
Baddeley’s model of working memory (2000; 2002), Paivio’s (1986) dual-coding theory and the
general framework for thinking, memory can be seen as consisting of both a visual-spatial coding
system and a verbal coding system, which may work collaboratively or independent of one another
during perceptual and encoding processes. As a result, it is possible that students with different levels
of verbal and spatial reasoning ability would approach the text reading and AM reading tasks in
different ways. For example, when studying an AM, a student with higher verbal reasoning ability and
lower spatial reasoning ability may focus on the verbal aspects of the map and not make full use of the
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spatial arrangement of propositions for the purpose of comprehending arguments or committing them
to memory. On the other hand, a student with higher spatial reasoning ability and lower verbal
reasoning ability may focus on the spatial arrangement of detail on the map and give less attention to
the text.
Those with high verbal and spatial ability may have the capacity to focus on both aspects, that
is, the verbal detail of the propositions as well as their relational structure in the spatial array of the
AM. In this context, given that high levels of both abilities may moderate the relationship between AM
and text reading on memory and comprehension outcomes, it is necessary to control for both verbal and
spatial reasoning in order to ensure that differences between the AM group and text group are not a
result of higher levels of either reasoning ability. It was further hypothesised that higher verbal and
spatial reasoning scores would correlate with higher memory and comprehension scores (Hitch &
Baddeley, 1976; Jiang, Olson & Chun, 2000; Luck & Vogel, 1997).
2.2 Experiment 1
Experiment 1 had two aims: (1) to replicate research conducted by Dwyer, Hogan, and
Stewart (2010), by examining differences between AM reading and text reading using a 30-proposition
version of the argument, ‘Computers can think’ and (2) to extend this previous research by examining
whether or not memory and comprehension performance varied as a function of study environment,
with students examined in both individual and group settings. Based on research by Dwyer, Hogan and
Stewart (2010), it was hypothesised that students who use AMs to study would perform better than
those who study from text on memory testing. It was further hypothesised that those who study from
AMs would perform better on comprehension testing, particularly in the individual study setting.
Specifically, because (1) comprehension is a more complex task than memorisation (Anderson &
Krathwohl, 2001) and because (2) social presence can negatively affect performance on more complex
tasks (Bond & Titus, 1983; Wühr & Huestegge, 2010); it was hypothesised that those in the isolated
study group would perform better than those in the group study setting on comprehension.
Research suggests the environment in which an individual studies information may affect how
the information is encoded and ultimately how it is retrieved (Godden & Baddeley, 1975; Tulving,
1984; Smith & Vela, 2001). Given that one important goal of the current set of experiments was to
examine the utility of AMs as a pedagogical aid, it was important to examine the difference between
classroom use of AMs and the use of AMs as individual study aids. In the current experiment, it was
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hypothesised that the beneficial effects of AMs would be greater in an individual (i.e. isolated study)
setting when compared with a group study setting as potentially less cognitive load would be imposed
on students in the individual study condition (e.g. social distractions that may cause attention
switching; Pollock, Chandler & Sweller, 2002; Tindall-Ford, Chandler & Sweller, 1997). Specifically,
Baron (1986) suggests that the presence of others may act as distracting stimuli, which may cause the
switching of attention from the intended focus of attention. Research by Mullen (1987) also suggests
that group settings can distract an individual’s focus away from the task at hand by focusing attention
towards the self (e.g. How do I look? or Is my behaviour acceptable?). Furthermore, though past
research has suggested that completion of cognitive tasks in the presence of others can increase
motivation (or drive) of those completing the task (Zajonc, 1965; 1980) and attentional focus (Klauer,
Herfordt & Voss, 2008), a meta-analysis by Bond and Titus (1983) found that the presence of others
can have a negative effect on performance for more complex tasks. Consistent with the above
hypothesis, Bond and Titus’ findings are also supported by more recent research conducted by Wühr
and Huestegge (2010), who found that social presence can negatively affect performance on cognitive
tasks due to the cognitive load (Sweller, 2010) associated with competition for working memory
resources and/or attentional resources.
2.2.1 Participants
Participants were first year Arts students (N = 131; 93 females, 38 males), aged between 18
and 25 years. In return for their participation students were awarded academic course credits.
2.2.2 Materials and Measures
Experimental materials were constructed by extracting a sub-set of the arguments presented in
Robert Horn’s (1999) AM: Can computers think? Two sets of study materials for this argument were
developed: a 30-proposition text and a 30-proposition argument map.
Memory was assessed using a ‘fill-in-the-blanks’ cued recall test that assessed memory for
reasons and objections linked to each of the major arguments supporting or refuting the central claim:
Computers can think. The test consisted of 14 questions and was scored on a scale of 0-28. Using the
intra-class correlation coefficient (ICC) method, the inter-rater reliability (as measured by two raters)
for the memory test was .90. Comprehension was scored on a scale of 0-12; students were asked to
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decide if a sub-set of 12 of the original propositions (present in both study conditions) either supported
or refuted the central claim: Computers can think.
2.2.3 Procedure
Participants were assigned to study in either a lecture hall (in the presence of other students
completing the same tasks) or alone in an isolated booth. After the study environment was allocated,
participants in each study environment were then randomly assigned to study the topic ‘Computers can
think’ from either a piece of text or from an AM. All participants were allotted 10 minutes to read their
assigned study materials and were instructed to learn the material with a view to being tested. After 10
minutes had elapsed, study materials were collected and the cued recall test was administered. After 10
minutes, the memory assessments were collected and the comprehension test was administered. Five
minutes were provided for completion after which tests sheets were collected and participants were
debriefed and thanked.
2.2.4 Results
Means and standard deviations are presented in Table 2. A 2 x 2 between subjects
MANCOVA was used to assess the effects of study materials and environment on comprehension and
recall of arguments, while controlling for baseline verbal and spatial reasoning ability. The two
between-subjects factors were study materials (text versus argument) and environment (individual
versus group setting).
A significant main effect of study materials (F [1, 125] = 11.68, MSE = 13.71, p = .001, partial
η² = .09), was found with AM participants showing higher recall than text participants. There was also
a significant main effect of study environment (F [1, 125] = 7.04, MSE = 13.71, p = .009, partial η² =
.05), with group setting participants showing higher recall than isolated setting participants. There was
no study material x study environment interaction effect on memory.
There was no significant effect of study material or study environment or any interaction
effect on comprehension performance. Both memory and comprehension were significantly correlated
with verbal reasoning (Memory: r = .33, p = .015; Comprehension: r = .45, p = .001). However,
neither was correlated with spatial reasoning ability.
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Insert Table 2 around here
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2.2.5 Discussion of Experiment 1
Results from Experiment 1 revealed that those who studied from AMs recalled more
information than those who studied from text, regardless of the environmental setting, which is
consistent with research by Dwyer, Hogan and Stewart (2010). The results also revealed that, contrary
to the proposed hypothesis, students who studied and were tested in a lecture hall setting performed
better than those who studied and were tested in an individual study booth. In this experiment,
participants in the lecture hall setting were monitored to ensure that they did not consult or copy from
one another. In the absence of consultation or copying, it may be that the lecture hall setting provided a
more formal and stimulating testing venue. It is also possible that students recognised the presence of
others as a potential distractor, thus leading to added attentional focusing; in which students’ ability to
screen out distractions was enhanced (Klauer, Herfordt & Voss, 2008). Alternatively, it is further
possible that participants may have felt more drive and responded more competitively in a group
setting - in other words, the effect may have been due to some sort of social facilitation (Zajonc, 1965;
1980), which facilitated memory performance even in the context of what was assumed to be a
relatively complex argument reading task.
While a group setting may affect participants in particular ways that an isolated setting does
not (e.g. distraction, attention switching and social facilitation), such effects were equal across
experimental manipulations of materials in the current study. Also, post-hoc analysis revealed that, in
comparison with text reading, AM reading was associated with better subsequent memory performance
in the group setting and the isolated test setting (p < .05 for both comparisons). As such, the beneficial
effects of AM reading on memory performance were robust in both an isolated test setting and a group
setting, notwithstanding the potential impact of social distraction, social facilitation and other factors
linked to group study and testing. In any event, one purpose of this series of experiments was to
elucidate the effect of different study techniques in the context of the classroom; and thus, the large
group setting has ecological and face validity. As such, all subsequent experiments were conducted in a
lecture hall setting only.
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Results of the current experiment also revealed that there was an effect of neither study
environment, nor AM reading on comprehension performance; a finding which is again consistent with
research by Dwyer, Hogan and Stewart (2010). Mean scores on the comprehension test suggest that
students were performing on average not very far above chance levels (they scored between 6.5 and 7.5
out of 12 on average in a two-choice proposition classification test). In other words, it may be that
students did not deeply comprehend the argument and when they were unsure as to whether or not a
proposition either supported or refuted the central claim, they simply guessed; and as there were only
two answers to choose from, they could guess the correct answer approximately half the time. At the
same time, it is notable that students who scored higher on the comprehension test also performed
better on the verbal reasoning sub-test of the DAT. Those high on verbal reasoning ability may have
engaged in some form of higher-order metacognitive thinking (e.g. critical thinking) while working to
learn from the study materials. Thus, while the findings suggest that the reading of AMs facilitates
memory for arguments, it may be that some additional training in AM is needed to foster the kinds of
metacognitive skills that may be necessary to support deeper comprehension.
Research suggests that to perform optimally in tests of comprehension and memory, one
should read first to understand and then re-read in order to memorise (Pollock, Chandler & Sweller,
2002). However, it is possible that because students were aware that they would be tested after they
studied, they assimilated information strictly for purposes of memorisation and sacrificed the need to
truly comprehend the argument structure. Thus, it may be that there was not enough time to study
materials for purposes of truly evaluating and comprehending the argument, at least, not enough time to
distinguish text reading from AM reading in this context.
Nevertheless, in the presence of a significant correlation between verbal reasoning and
memory performance, and controlling for this co-variation, there remained a significant effect of
stimulus materials on memory performance. In other words, although verbal reasoning ability also
predicted memory performance, unlike for comprehension test performance, the reading of AMs
provided some additional benefits in terms of memory for individual propositions in a cued-recall test.
It may also be that a certain amount of information can be remembered in the absence of truly
understanding the relational structure of an argument, and that AMs facilitate memory for discrete
propositions in this context by highlighting each proposition in a distinct box.
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Given the apparent memorial advantage of AM over text as shown in this first experiment, one
further question that immediately arises is whether or not this benefit would be sustained over time;
that is, from immediate recall (as assessed in this experiment) to delayed recall (i.e. one week later).
Retention of information over longer durations is of course important; not alone for the purpose of
acquiring knowledge, but also for deepening comprehension. For example, it may be the case that the
deeper comprehension of arguments is not only dependent on extensive reading and learning, but also
on sufficient construction of schemas, which are built in order to retain information for relatively long
periods of time. This schema-building process may allow for connections between arguments encoded
at various times to be integrated in different configurations and at different levels of complexity. In
order to investigate whether advantages of AM reading versus text reading would be sustained over
time, Experiment 2 sought to examine the impact of study materials on immediate and delayed recall
for both smaller and larger argument structures.
2.3 Experiment 2
Experiment 2 had three key aims. The first was to replicate research conducted by Dwyer,
Hogan, and Stewart (2010), by examining differences between small and large study materials -
whether or not the beneficial effects of AM on memory extend to larger materials that impose a greater
amount of cognitive load. Though Dwyer and colleagues previously found a larger benefit for smaller
argument structures over larger argument structures, it may have been that the effects of argument size
they observed were a function of the topic being studied. Dwyer and colleagues had speculated that the
beneficial effects of AM would be greater for larger argument structures because graphical
representation would be increasingly beneficial as cognitive load increases (Chandler & Sweller, 1991;
Sweller, 1999, 2010). However, first year Arts students may have been largely unfamiliar with the
arguments presented in the ‘Computers can think’ argument structure, and thus AM reading in this
experiment may have evoked a slower, more analytical reading of arguments which moderated
additional beneficial effects of AM reading over text reading as argument size, increased. Thus, the
second aim of Experiment 2 was to make comparisons between AM and text reading, but in the context
of a different study topic. In research by Dwyer, Hogan and Stewart (2010) and the research conducted
in Experiment 1, students studied and were tested on the topic Computers Can Think. In Experiment 2,
students studied and were tested on the topic Aggression is Biologically Caused. This was done in
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order to investigate whether the effects seen in previous experiments would be replicated in the context
of a different topic.
The final aim of this experiment was to extend previous research on AM’s effect on recall by
examining whether or not the beneficial effects of AM extend across time. Thus, students’ memory was
tested both immediately after studying and again a week later (i.e. delayed recall). It was hypothesized
that beneficial effects of AM reading would be greater for delayed over immediate recall assessment.
More specifically, it was hypothesized that benefits of organisation and dual-coding (i.e. visual and
verbal coding) on memory (Mayer, 1997; Paivio, 1986; 1971) are sustained for longer, thus the
forgetting rate from immediate to delayed recall assessment would be less for AM reading when
compared with text reading.
2.3.1 Participants
Two-hundred and eighty-six first year Arts students (204 females, 82 males) took part in the
initial (study and assessment) session, while, due to attrition in attendance, only 199 (142 females, 57
males) took part in the second (assessment only) session.
2.3.2 Materials and Measures
Study materials, each of which presented the topic ‘Aggression is biologically caused’
included (1) a 30–proposition (small) text, (2) a 50-proposition (large) text (3) a 30-proposition AM
and (4) a 50-proposition AM. Memory was assessed using a ‘fill-in-the-blanks’ cued recall test with 12
questions that probed for reasons and objections linked to major arguments supporting or refuting the
claim ‘Aggression is biologically caused’ and was scored on a scale of 0-24. Inter-rater reliability
(based on the ICC method) for this test was .95. The delayed recall test was the same as the immediate
recall test except for the order of presentation of questions.
2.3.3 Procedure
Participants were randomly allocated to one of four groups in which they studied from either a
30-propositon AM, a 50-proposition AM, a 30–proposition text, or a 50-proposition text. Study
materials were distributed and participants were instructed to learn the material with a view to being
tested. Participants were provided 15 minutes to study their materials in this experiment (i.e. 5 minutes
longer than in Experiment 1), in order to provide those learning from both smaller and larger argument
structures with enough time to assimilate the information provided. After 15 minutes had elapsed, study
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
15
materials were collected and the cued recall test was administered. Participants were given 10 minutes
to complete this test, after which tests were collected and the class concluded. The following week,
participants returned and were given a 10 minute re-test on the same material.
2.3.4 Results
Given the substantial variation in sample size for immediate and delayed recall assessments,
three separate ANCOVAs were conducted. A 2 (study materials) x 2 (size) ANCOVA was first
conducted to examine the effects of the study materials and material size on immediate recall, while
controlling for baseline verbal and spatial reasoning ability. Results from the ANCOVA revealed a
significant main effect of size (F [1, 280] = 65.67, MSE = 12.21, p < .001, partial η² = .19), with the
smaller argument structure group showing significantly better recall performance than the larger
argument structure group. Results from the ANCOVA also revealed a significant main effect of study
material (F [1, 280] = 24.17, MSE = 12.21, p < .001, partial η² = .08), with the argument map group
showing better recall performance than the text group. However, there was no size x study material
interaction. Descriptive statistics are shown in Table 3. Recall performance was significantly correlated
with both verbal (r = .33, p < .001) and spatial (r = .24, p < .001) reasoning ability.
------------------------------------
Insert Table 3 around here
-------------------------------------
A 2 (study materials) x 2 (size) ANCOVA was conducted to examine the effects of study
materials and size of materials on delayed recall, controlling for baseline verbal and spatial reasoning
ability. Results revealed a significant main effect of size (F [1,193] = 39.83, MSE = 11.05, p < .001,
partial η² = .17), with the smaller argument structure group showing higher delayed recall performance
than the larger argument structure group. There was no main effect of study material, nor any size x
study material interaction. Delayed recall was significantly correlated with both verbal (r = .34, p <
.001) and spatial (r = .20, p = .004) reasoning ability.
A 2 (study materials) x 2 (size) x 2 (testing times) mixed ANCOVA was conducted to
examine memory performance differences between study groups at two testing times, both immediately
after the study period and one week later. There was a main effect of study materials (F [1,193] = 8.29,
MSE = 20.31, p = .004, partial η² = .04), with the argument map group scoring significantly higher than
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
16
the text group. There was also a main effect of size (F [1,193] = 51.46, MSE = 20.31, p < .001, partial
η² = .21), with the smaller argument structure group scoring higher than the larger argument structure
group. Though there was no main effect for time, there was a significant time x study material
interaction (F [1, 193] = 10.46, MSE = 3.49, p = .001, partial η² = .05), whereby the benefits of
argument map over text were greater for immediate recall relative to delayed recall (see Figure 2).
There was no size x time interaction, nor was there a three way interaction.
------------------------------------
Insert Figure 2 around here
-------------------------------------
2.3.5 Discussion of Experiment 2
The findings from Experiment 2 further confirm that AMs can facilitate better immediate
recall for arguments than text reading. In addition, this finding suggests that argument map superiority
is not dependent on topic studied, as similar results were found in Experiment 1, which used a different
study topic. This experiment also examined delayed recall. Overall memory performance decreased on
average from testing time 1 to testing time 2. In addition, against our initial hypothesis, the superiority
of AM seen for immediate recall did not show strong transfer to delayed recall. Although the AM
group scored higher on average than the text group on delayed recall, the former also showed a greater
decrease in performance from immediate to delayed recall than the latter.
Results revealed that large argument groups showed poorer recall than small argument groups.
These data indicate a threshold in terms of number of propositions that can be reasonably assimilated in
a short space of time, regardless of format or time of assessment. For example, recall of 12 target
memories from a set of 50, after a study period of 15 minutes, is more difficult than being asked, given
a similar study period, to recall the same 12 target memories from a set of 30. This is consistent with
Cognitive Load Theory (Pollock, Chandler & Sweller, 2002), which suggests that study environments
that overburden memory are associated with poor learning outcomes (Sweller, 1999).
Findings from this experiment also appeared to confirm the pattern of findings from the
Experiment 1, as there were correlations between verbal reasoning and both immediate recall
performance; providing further evidence to suggest that those who are proficient at verbal reasoning are
able to recall more information from their studying, even when it has been a week since they studied
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
17
that information. In addition, unlike Experiment 1, there was a significant correlation between spatial
reasoning and immediate recall, as well as with delayed recall.
Though Experiments 1 and 2 yielded some very interesting findings, in order to
comprehensively evaluate AM as a learning tool, it must be assessed not only as a passive learning aid,
but also as an active learning aid. This line of research is reasonable to consider, given that AM was
designed specifically as a means of actively structuring arguments (van Gelder, 2002; 2007), rather
than as a method of passively assimilating arguments or presenting them to others. The importance of
this active construction of arguments is also relevant given recent research findings regarding the
beneficial effects on learning outcomes of infusing active learning into classroom settings (e.g.
Burbach, Matkin & Fritz, 2004; Butchart et al., 2009; Perry et al., 1996). As AM software is designed
specifically for active construction of arguments, a logical progression in AM research is to assess
whether active learning conducted through AM construction enhances memory performance. Thus,
while Experiments 1 and 2 assessed the effects of passively studying from previously constructed AMs
on students’ recall performance, Experiment 3 examined whether active learning through AM
construction enhanced students’ recall performance.
2.4 Experiment 3
The aim of Experiment 3 was to compare the effects of active AM, hierarchical outlining and
standard text summarization on immediate recall performance in the context of the active learning and
study of arguments. Previous research has demonstrated the beneficial effects of active study on
learning outcomes (e.g. Burbach, Matkin & Fritz, 2004; Hake, 1998; Laws, Sokoloff & Thornton,
1999; Perry et al., 1996; Redish, Saul & Steinberg, 1997). In addition, all three strategies examined in
Experiment 3 can be usefully employed to actively study and assimilate text-based arguments (Butchart
et al., 2009; Kintsch & van Dijk, 1978; Taylor, 1982; Taylor & Beach, 1984). However, it can be
argued that AMs offer particular advantages in this regard, given that the active construction of AMs
may make the relationships among propositions clearer via its ‘box-and-arrow’ format, thus enhancing
the ability to assimilate arguments (van Gelder, 2003). Therefore, it was hypothesised that students
who actively construct and study AMs would perform better on immediate recall assessment than those
who actively construct and study either outlines or text summaries. It was also hypothesised that
students who actively construct and learn from hierarchical outlines would perform better on
immediate recall assessment than those who actively learn using text summarisation techniques. The
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
18
latter prediction is based on the facts that hierarchical outlines, like AMs, present information in a
hierarchically structured manner and that they have been shown to significantly enhance learning in
previous research (Robinson & Kiewra, 1995; Taylor, 1982; Taylor & Beach, 1984).
2.4.1 Participants
Participants were 1st year Arts students (N = 136; 97 females, 39 males), aged between 18
and 25 years. In return for their participation students were awarded academic course credits.
2.4.2 Materials and Measures
All groups were provided with a common study text which contained 30 propositions which
argued for and against the claim: ‘There was nothing wrong with the United States Supreme Court's
decision to uphold the individual's right to bear arms’. Participants were also provided with materials
appropriate to their particular condition: Argument Mapping: a 30-proposition AM with 12 boxes left
blank; Hierarchical Outlining: a 30-proposition outline with 12 proposition lines left blank; Text
Summarisation: a blank page. The texts provided to those in all three conditions were identical, but
study tools (i.e. AM, Outline, Text summarisation) were different for each condition.
Memory was assessed using a ‘fill-in-the-blanks’ cued recall test that assessed memory for
reasons and objections linked to each of the major arguments supporting or refuting the central claim:
‘There was nothing wrong with the United States Supreme Court's decision to uphold the individual's
right to bear arms’. The test consisted of 12 items and was scored on a scale from 0-24. Inter-rater
reliability (based on ICC) of the test was .92.
2.4.3 Procedure
Participants were randomly allocated to one of three groups in which they studied via one of
three active learning techniques: text summarisation, hierarchical outlining or AM. In all three groups,
participants were given a 30-proposition text to read, based on the central claim ‘There was nothing
wrong with the United States Supreme Court's decision to uphold the individual's right to bear arms.’
and were asked to transfer a portion of the information (i.e. 12 propositions) into another document
using a particular technique. Participants in the AM condition were given an incomplete AM and were
asked to “complete the argument map by filling in the 12 blank boxes with the correct propositions
from the associated text”. Participants in the outlining group were given an incomplete hierarchical
outline and were asked to “complete the outline by filling in the 12 blank spaces with the correct
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
19
propositions from the associated text”. In the text summarisation group (i.e. the control group),
participants were given a blank sheet of paper and were instructed to “take notes as you would
naturally, summarising the text on the blank sheet of paper provided, with a specific focus on the last
paragraph of the text” (i.e. the same portion of text that was subject to transfer in the other conditions).
Participants were given five minutes to read the text (which contained 30 propositions) and a
further 20 minutes to actively learn using their designated method. After the 25 minutes had elapsed,
study materials were collected. The cued recall test was then administered with ten minutes allotted for
completion. Finally, the completed recall tests were collected and participants were debriefed and
thanked. Only those who took part in the active learning portion of the study session (i.e. specifically,
those who filled in at least four boxes on the AM, four blank lines on the outline or wrote down four
propositions on the blank page) were included in the data analysis. Taking into account the amount of
time allowed to complete the task, it was decided that completion of a third or more of the allotted
exercise indicated a genuine effort to both read and actively learn.
2.4.4 Results
A between-subjects ANCOVA was used to analyse the effects of the three active learning
techniques on immediate recall. The between-subjects factor was study technique (text summarization,
outlining and AM) while the covariates were baseline verbal and spatial reasoning ability. Preliminary
analysis evaluating homogeneity-of-slopes indicated that in the case of both verbal and spatial
reasoning, immediate recall did not differ significantly as a function of experimental condition. Results
from the ANCOVA revealed a significant main effect of study technique (F [2,131] = 16.35, MSE =
11.09, p < .001, partial η² = .20), with the AM group scoring significantly higher on memory testing
than the text summarization group; and with the outline group also showing significantly higher
memory performance than the text summarization group (F [1,131] = 30.68, MSE = 11.09, p < .001, d
= .84). Descriptive statistics are shown in Table 4. No difference was found between the AM and
outline groups on memory performance. Results further revealed that memory performance was
significantly correlated with verbal reasoning (r = .40, p < .001), but not with spatial reasoning (r = .14,
p = .098).
------------------------------------
Insert Table 4 around here
-------------------------------------
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
20
2.4.5 Discussion of Experiment 3
The findings from Experiment 3 showed that both AM and hierarchical outline construction
facilitated better immediate recall performance than text summarization. One reason for the apparent
superiority of both AM and outline construction over text summarization is that in the two former
methods, information must be hierarchically organised, which research suggests can improve memory
performance (Robinson & Kiewra, 1995; Taylor, 1982; Taylor & Beach, 1984), while in the latter,
though participants may have organised information hierarchically, they need not have. For example,
participants in the text summarization condition may have elected to use a summarization method that
did not employ hierarchical organisation thus putting them at a potential disadvantage compared with
those in the other groups.
It was hypothesised that the spatial organisation of propositions within an AM might facilitate
superior recall in comparison with hierarchical outlines. Though the AM group did show better recall
on average than the outlining group, the difference between the two groups was non-significant. This
pattern suggests that though the spatial organisation of propositions in an AM may benefit memory, the
hierarchical organisation of propositions may be the most critical factor influencing subsequent recall.
Finally, consistent with the results from previous experiments, a correlation was found
between verbal reasoning and immediate recall. This finding provides further confirmation of the link
between verbal reasoning ability and memory for arguments in classroom learning contexts - a
relationship that appears to hold both for more passive reading and more active learning conditions.
However, as in Experiment 1, there was no correlation between recall and spatial reasoning ability, thus
suggesting that spatial reasoning ability is not a critical factor determining one’s ability to recall
specific propositions in an argument, regardless of whether or not AMs were used to study the
argument.
3.0 General Discussion
3.1 Interpretation of Results
Results from this series of experiments suggest that learning through AM reading and
construction facilitates subsequent recall of propositions in an argument structure and that AM study
seems to be superior in this respect to a number of more traditional study formats, including passive
text-reading and active text summarisation. In addition, the superiority of AM reading and construction
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
21
in this respect appears to hold across study settings (i.e. isolated study settings and lecture hall settings)
and topics studied. Nevertheless, as observed in Experiment 2, AM’s ability to facilitate enhanced
recall over traditional text-based reading was not well maintained over time. In Experiment 3, results
revealed that those who actively learned via constructing an AM or a HO performed significantly better
than those in the text summarisation group on the recall assessment, most likely as a result of the
explicit hierarchical organisation of information in both the AM and HO conditions (Dwyer, Hogan &
Stewart, 2010; Taylor, 1982; Taylor & Beach, 1984).
As previously discussed, a growing body of literature suggests that organisational strategies
can be used to facilitate recall performance and learning in general (e.g. Berkowitz, 1986; Dwyer,
Hogan & Stewart, 2010; Meyer, Brandt & Bluth, 1980; Myers, 1974; Oliver, 2009; Robinson &
Kiewra, 1995; Taylor, 1982; Taylor & Beach, 1984). Importantly, the organizational structure of text
may not always facilitate learning and memory. Text is sequential, but the argument presented within
text is not and thus, the nature of text does not allow one to link propositions that support or dispute
specific claims (van Gelder, 2003). Overall, we attribute AM’s superiority over text-based studying to
the hierarchical structuring of information in AMs. Notably, any group condition which studied from
hierarchically organised study materials (e.g. AM and HO) recalled significantly more than groups
which did not have hierarchically organised materials. This finding is consistent with previous research
by Taylor (1982) and Taylor and Beach (1984) who found that the use of hierarchical summarisation
increased recall and comprehension performance of those who used the technique.
Results from Experiment 2 showed that those who studied small argument structures,
regardless of format, scored significantly higher on both immediate and delayed recall performance
than those who studied from large study materials. Given the increased cognitive load associated with
larger arguments, this finding was not surprising as research suggests that study environments that
overburden memory are associated with poor learning outcomes (Sweller, 1999). However, it was also
found that AM seemed to provide less of an advantage over other formats in the context of the larger
(50 proposition) map than in the context of the smaller (30 proposition) map. This finding is converse
to our stated hypothesis that the superiority of AM studying would be greater when cognitive load is
increased, as AMs are designed partly to decrease cognitive load. Overall, the data suggest that there is
a threshold in terms of the number of propositions that can be reasonably assimilated in a short space of
time, regardless of study format. This finding supports previous research regarding the limited capacity
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
22
of working memory and how an increase in the amount of information that is necessary to assimilate
contributes to cognitive load (e.g. Cowan, 2000; Pollack, Chandler & Sweller, 2002; Sweller, 1999;
2010).
The correlation between memory performance and both verbal and spatial reasoning ability
was also measured in all the experiments. In every case, verbal reasoning was significantly correlated
with memory performance, which is consistent with findings reported by Dwyer Hogan and Stewart
(2010). It is hypothesized that verbal reasoning and recall were correlated because those who are
proficient at verbal reasoning are able to retain information long enough in order to analyse and
evaluate propositions and their relations in an argument structure, which in turn facilitates their ability
to answer subsequent test questions correctly (Colom et al., 2005; Hitch & Baddeley, 1976). This
interpretation is also consistent with the results of Experiment 1, in which verbal reasoning was also
found to be correlated with comprehension performance.
Spatial reasoning was only found to be correlated with recall test performance in Experiment
2. This finding suggests that spatial reasoning ability can influence memory for arguments in a text or
an AM in specific learning contexts, but that verbal reasoning ability may be a more robust and
consistent predictor of memory in educational contexts. Nevertheless, the prime reason that the spatial
reasoning assessment was administered in this research was in order to control for baseline ability. For
example, those better at spatial reasoning, may be better suited to study from AMs than from text.
3.2 Limitations & Future Research
Though the results of these experiments are informative in terms of the comparison between
AM and alternative learning techniques, there are some limitations to the research that must be
considered. One possible limitation is that there are student characteristics other than verbal and spatial
reasoning ability that may have influenced learning and may have been usefully included in the
analysis, such as motivation or interest in study topics and learning methods, for example. In retrospect,
it is reasonable to assume those with higher levels of motivation to learn or to out-perform others, or
those who found certain study methods novel and interesting (e.g. argument mapping or active
learning), may have been more motivated to succeed and thus, may have outperformed others not
similarly motivated or interested (Marzano, 1998; Pintrich, 2000, Pintrich & DeGroot, 1990). For
example, the lack of an effect of AM reading on comprehension in Experiment 1 may have been caused
by a lack of motivation to engage in higher-order thinking processes (e.g. critical thinking) that may be
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
23
critical drivers of comprehension in novel learning environments. In addition, participants who were
interested in new learning techniques – even by the slightest manipulation to the technique, for
example, colour in an AM, may have been further motivated by this novelty to perform better. In other
words, in addition to a possible main effect of motivation on performance (Garcia, Pintrich & Paul,
1992; Pintrich, 2000), it is possible that there was an unobserved interaction effect between motivation
and novelty of learning materials across experiments. Having some knowledge of students’ motivation
may also have shed light on the attrition of students from testing time 1 to 2 in Experiment 2. Thus, the
differential impact of instructional techniques on participants who were highly motivated should have
been compared with the effects on those participants who were poorly motivated.
Another possible limitation that should be considered is that methods for gauging the
difficulty of the topic studied, or students’ familiarity with or interest in the topic, were not used. It may
have been that memory performance was not a result of recall ability alone, but could also be a result of
interest or familiarity with the topic studied (Taylor & Beach, 1984). Three different topics were used
in this set of experiments and yielded similar patterns of findings. Nevertheless, participant ratings of
familiarity, difficulty or intrinsic interest could yield potentially useful, additional information; perhaps
especially with respect to unexpected patterns of findings such as the lack of an effect for
comprehension in Experiment 1 or idiosyncratic patterns such as that seen for spatial reasoning in
Experiment 2. Notably, though student’s motivation, interest and familiarity with the topics studied in
Experiments 1-3 would all have been useful, one general challenge in these experiments was the issue
of working within the allotted class time of 50 minutes. This time constraint made the inclusion of
multiple assessments difficult for the efficient running of experiments with large numbers of students.
Nevertheless, future research on AM’s effect on key aspects of performance, such as memory and
comprehension, needs to address some of the limitations discussed thus far, including motivation to
learn, familiarity with the topic studied, perceived difficulty of the topic studied and interest in the topic
studied.
This research aimed to compare AM and traditional presentation formats. However, one
difficulty in making a fair comparison between these formats is that participants have been exposed to
traditional formats such as text reading, all their lives, whereas they were new to AMs. Though the
training provided in these experiments (i.e. a 50 minute lecture), may have been enough for participants
to perform well in terms of studying from and constructing semi-completed AMs, it may not have been
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
24
enough for the full potential of the advantageous effects of AM reading and construction on delayed
recall and comprehension to be realised. If the AM training provided was insufficient with respect to
the reading of AMs, then this can be seen as a possible explanation for the null effects on
comprehension performance in Experiment 1 and delayed recall performance in Experiment 2.
In order for a more equal comparison to be made, participants would likely require more
substantial training in the use of AM than that provided in these experiments. This view is consistent
with van Gelder, Bissett and Cumming’s (2004) view on the potential beneficial effects of AM on
critical thinking; that is, in terms of achieving optimal growth in critical thinking ability, one must also
consider what level of ‘deliberate practice’ is needed. Naturally, it is not simply the method or tools of
instruction and learning that are important when working to cultivate critical thinking ability, but also
the intensity and quality of practice. The question arises in this context as to what level of AM
familiarity and practice is needed to facilitate optimal memory and comprehension performance when
using AM reading or construction as a classroom exercise. Guidelines on what constitutes sufficient
training in AM, in the context of critical thinking training studies, have been provided by van Gelder,
Bissett and Cumming (2004) and suggest a semester long course in critical thinking taught through
argument mapping for purposes of improving critical thinking ability. Though it was not an aim of this
research to examine argument mapping’s effect on critical thinking, it is hypothesized, based on van
Gelder and colleagues’ research, that any semester-long course that teaches a subject through AMs will
adequately teach students how to use argument mapping as a study method to facilitate memory and
comprehension ability. As a result, an aim for future research should be to examine the effects of
explicit training in AM and the related method of hierarchical summarisation (i.e. outlining) on
memory and comprehension.
Finally, given that AMs represent arguments through dual modalities (i.e. both verbal and
visual-spatial forms of representation), and given that students may potentially prefer a visual-based
learning style over a verbal-based learning style or visa versa, future research could compare the
differential effects of AM study and construction activities on the performance of students who differ
in their visual versus verbal thinking styles. Furthermore, there are a number of learning/thinking styles
that can be assessed in relation to effects of AM on memory and comprehension (e.g. judicial thinking,
legislative thinking and executive thinking styles; Sternberg, 1999). Thus, future research should
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
25
examine the effects of AM on memory and comprehension performance of students with varying
learning styles.
3.3 Summary and Conclusion
An important goal for teachers should be to aid students in their acquisition of textbook
knowledge. For example, through the teaching of organizational strategies that can help improve their
comprehension (Meyer, Brandt & Bluth, 1980) and memory (Sweller, 1999); with the added goal of
keeping cognitive load to a minimum. Based on AM’s hypothesised ability to keep constraining factors
like cognitive load to a minimum (van Gelder, 2000, 2001), the current research aimed to replicate and
extend findings from research conducted by Dwyer, Hogan and Stewart (2010) by examining the
effects of AM on memory and comprehension through manipulating study environment (i.e. isolated or
group settings), length of time information is retained (i.e. immediate and delayed recall) and learning
methods (passive and active learning).
The results of these experiments demonstrated that, when compared with traditional text-based
information delivery methods (e.g. linear prose), AM reading and construction significantly increased
subsequent immediate recall for arguments in both passive and active learning settings. However,
further research examining the effects of AM training on delayed recall and comprehension is also
necessary. Overall, the findings of the current research recommend AM as an efficacious methodology
for learning and teaching compared to other protocols and particularly in comparison with standard
text-based learning.
EFFECTS OF ARGUMENT MAPPING ON MEMORY & COMPREHENSION
26
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Figure 1: An example of an argument map built using Rationale™
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Figure 2: Memory performance of those in both study material groups from test time 1 to time 2.
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Table 1: The core manipulations and hypotheses associated with each experiment
Experiment Design Hypotheses
1 The effects of study format and setting on immediate recall and comprehension.
2 (study format) x 2 (setting) MANCOVA – independent variables (IVs): study format (text, argument map) and setting (group test, individual test). Dependent variables (DVs): comprehension, immediate recall.
Argument map group will show better memory and comprehension than text group, regardless of environmental context. No effect on memory or comprehension due to setting.
2 The effects of study format and argument size on immediate and delayed recall.
2 x 2 x 2 Mixed ANCOVA. IVs: format (text and map) and argument size (30 and 50 propositions). DVs: immediate and delayed recall.
Argument map group will show better immediate and delayed recall than text group. Beneficial effects of argument map condition will be greater for larger argument structures. Better immediate recall performance when compared with delayed recall assessment.
3 The effects of different active learning strategies on immediate recall.
Between Subjects ANCOVA. IV: learning strategy (3 levels: summarization, outlining, argument mapping). DV: immediate recall.
Argument map translation exercise fosters better immediate recall than outlining or summarisation. Outlining exercise fosters better recall memory than summarisation.
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Table 2: Descriptive Statistics for Study Material x Environmental Context on Immediate Recall & Comprehension
Condition M Std. Deviation N
_________________________________
Memory
Lecture Hall Setting
Text 5.80 3.87 39
Argument Map 7.97 4.79 37
Isolated Setting
Text 4.29 2.64 27
Argument Map 6.18 3.81 28
Comprehension
Lecture Hall Setting
Text 7.08 2.25 39
Argument Map 6.58 2.21 37
Isolated Setting
Text 7.44 2.64 27
Argument Map 6.54 2.63 28
_________________________________
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Table 3: Descriptive Statistics for Study Material x Size on Immediate & Delayed Recall
Condition M Std. Deviation N
_________________________________
Small
Immediate Recall
Text 7.76 3.65 63
Argument Map 10.83 4.41 65
Delayed Recall
Text 6.28 3.64 50
Argument Map 7.58 4.20 52
Large
Immediate Recall
Text 5.26 3.41 81
Argument Map 6.47 3.62 77
Delayed Recall
Text 3.94 3.37 56
Argument Map 4.05 2.90 41
_________________________________
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Table 4: Descriptive Statistics for Effects of Actively Learning from Study Materials on Immediate Recall
Condition M Std. Deviation N
_________________________________
Text Summarisation 4.84 3.25 37
Outlining 7.76 3.68 51
Argument Mapping 9.42 3.77 48